Category:Silurian igneous rocks in the United States
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This category has the following 3 subcategories, out of 3 total.
Media in category "Silurian igneous rocks in the United States"
The following 2 files are in this category, out of 2 total.
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Fine grained granite plateXVI MD Geol Survey 1898.jpg 1,216 × 1,220; 191 KB
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Guilford Quartz Monzonite closeup.jpg 1,024 × 566; 336 KB